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Accepted
Kendall Hopkins
Asked: 2010-06-03 13:48:18 +0800 CST

How make rewrite rules relative to .htaccess file

  • 772

Current I have an .htaccess file like this.

RewriteEngine On

RewriteCond %{REQUEST_FILENAME} !-f [OR]
RewriteCond %{REQUEST_URI} ^/(always|rewrite|these|dirs)/ [NC]

RewriteRule ^(.*)$ router.php [L,QSA]

It works create when the site files are in the document_root of the webserver (ie. domain.com/abc.php -> <DOCUMENT_ROOT>/abc.php). But in our current setup (which isn't changeable), this isn't ensured. We can sometimes have arbitrary folder in between the document root and folder of the .htaccess file (ie. domain.com/something/abc.php -> <DOCUMENT_ROOT>/something/abc.php). The only problem with is that is the second RewriteCond no longer works. Is there anyway to dynamically check if the accessed path by a path relative to .htaccess file.

For Example:

If I have a site where domain.com/prefix/ is the directory of the .htaccess file.

NOT FORCED TO REWRITE -> domain.com/prefix/index.php
FORCED TO REWRITE -> domain.com/prefix/rewrite/index.php

If I have a site where domain.com/ is the directory of the .htaccess file.

NOT FORCED TO REWRITE -> domain.com/index.php
FORCED TO REWRITE -> domain.com/rewrite/index.php
apache-2.2 mod-rewrite

3 Answers

  1. Best Answer

    There's a solution but it's not simple.

    Use RewriteMap.

    Here's how I would do:

    Create a RewriteMap file. See here for more information. This is a very simple text file with: first, the wrong URL without the '/', then one space (at least) and then the right url, like this:

    ok​ /folder1/
ok /folder2/
ok /folder3/

    Then the code:

    RewriteMap myfoldermap \
  dbm:/web/htdocs/yourwebsite.com/rewriterules/myfoldermap.map

RewriteCond %{REQUEST_URI} ^/([^/]+)/(.*)
# Now in '%1' there's the name of the folder
# Don't touch the URL but...
# ...check if it exists in the map file
RewriteRule (.*) - [QSA,E=FOLDERMAP:${myfoldermap:%1|notfound}]

# if the environment is neither empty or not found...
RewriteCond %{E:FOLDERMAP} !^(notfound|)$
# this means we found something...
# => apply the RewriteRule
RewriteRule ^(.*)$ router.php [L,QSA]

    If it doesn't work: read my usual "two hints", and add the rewrite log in your question.

    Two hints:

    If you're not in a hosted environment (= if it's your own server and you can modify the virtual hosts, not only the .htaccess files), try to use the RewriteLog directive: it helps you to track down such problems:

    # Trace:
# (!) file gets big quickly, remove in prod environments:
RewriteLog "/web/logs/mywebsite.rewrite.log"
RewriteLogLevel 9
RewriteEngine On

    My favorite tool to check for regexp:

    http://www.quanetic.com/Regex (don't forget to choose ereg(POSIX) instead of preg(PCRE)!)

    • 2

  2. Does Forced to rewrite means that the rewrite rule should work even if requested file or directory exists?

    If yes, just try to avoid creating the file / directory.

    Or seperate it to two rules:

    RewriteRule ^/(always|rewrite|these|dirs)/ router.php [L]

    RewriteCond %{REQUEST_FILENAME} !-f

    RewriteCond %{REQUEST_FILENAME} !-d

    RewriteRule ^(.*)$ router.php [L,QSA]

    • 1

  3. If I do understand you correctly (particularly I don't know what you mean with forced to rewrite), RewriteBase is for you.

    BTW: don't use stuff like domain.com :-)

    • 0